Coaster-brake.



F.S.BLLBTT.

GOASTER4 BRAKE.

APPLICATION FILED JUNE 1, 1908.

921,653. Patented May 11, 1909.1

WITNl-:ssl-:s: INVENTOR:

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FREDERICK S. lil/[.E'lT, OF ELMIRA, NEW YORK, ASSIGNO TOECLIPSE MACHINECOMPANY,

(JF ELMIRA, NEW YORK.

@ASTER-Braam,-

To all whom it 'may concern.:

Beit known that l, FREDERICK S. ELnETT, a Citizen of the United States,and resident of Elmira, in the county ol' Cheinung and State of NewYork, have invented certain new and useful lmproven'ient-s inCoaster-Brakes, of which the following is a specification.

' This invention relates to coaster 'brakes for bicycles and likevehicles, and hasfor its object a simple, compact' structure of fewparts that are cheaply made and easily assembled.

ln the drawlngsI-F1gure 1 1s a central,

longitudinal section of the rear or driving' pedaling', first to engage,and then to operate' the brake.

Referring to the drawings, l is the axle, adapted to be locked withinthe rear forks 2, 2 of the bicycle frame by the nuts 3, 3, respectively.On one end of the axle, therel is 'the usual sprocket 4, attached vtothe block 5,

and supported by ball bearings 6 upon the cone T. At the other end oithe axle there is a stationary block 8, held against rotation by the arml), that is adapted to be connected to the bicycle frame'. The hub Xis'rotatively supported by ball bearings 10 at one endend l 1. atthe'other u onthe sprocket block 5 and the stationary b ook 8,respectively, and the bra-ke shell is supported by the carrier 12.Diametrical recesses 13 and 14 1n the brake shell and carrier,respectively, receive the diametrical shoulder .l5 on the stationaryblock 8, so that both brake shell and carrier are heldagainst rotation,and the carrier is at the saine time movable longitudinally toward andfrom the stationary block t. A flange 16 on the inner endof the carrieris recessed at 17 to receive alu f 171- on the brake shell, adjacent tothe slot through it, and also at 18, in line with the slot in said brakeshell to receive the ex ander.

S.) lar, the hu and brake mechanism described are the same as thosedescribed in Specification of Letters Patent. Application 'filed June 1,

iny said application, Seal No. 430,400, and, as inthat application, thebrake actuator is `shown in the form of a longitudinally movable wedge19 that isforined in one'piece with the brake carrier 12 on its flangeL16. But the longitudinally movable actuator 19 operates upon a brakeexpander that is novel. 41t is the bar 20 that lies upon the carrier 12in the slot, between the edges ofthe brake shell.

18 in the flange 16 on the carrier, and is beveled at 21 to correspondwith the angular face of the wedge 19, while the other end is beveled at22 to engage the angular face of a similar wedge 23 on the stationaryblock 8. This wedge 23 also lies between the edges of the brake shell inline with the wedge 10, and is directed toward it.- Accordingly, whenthe actuator 12 is forced inwardly, toward the left in the drawino's,the 'wedge i9 forces the bar 20 toward theleft on to the wedge 23, andsince-the brake shell is held at each end against rotation by theshoulder 15 and the lug 1732A, respectively, the bar will expand it.

Various means may be employed to conneet the brake-actuator 12 with thesprocket 4. ln the drawings, lI show (sec Fig. 5) the saine connectorthat is shown in my said previous application. This is a nut thatcarries receives'the sprocket, and at 'the other the retarder sleevethat enters the carrier sleeve 12 and carries the retarding ringr 27.

-What l claim is: l 1. The comihination-with a rcvolublc hub, of adriver; a nonrota-ry, brake-ring within pander adapted to engage oneofthe longitudinal edges of said braken-ino; and means operated by saiddriver tor moving;V said expander circumferentially to expand saidbrake-ring, substantially as shown and described.

One end'ot' this bar projects outinto the slot v at one end the screwthreaded sleeve 25, thatv the hubsplit 'parallel with its axis; an cx 2.The combination with a revoluble hub,.

of a driverl g a non-rotary, longitudinally split brake ring Within thehub; an expander adapted to en age one oi' the longitudinal edges of;said rake-ring; and an actuator held against rotation by connection witha non-rotary part, and moved longitudinally bythe driver, to engage andmove in turn said expander circumferentially to expand said brake ring gsubstantially as shown and described.

e. The combination with a revoluble nul), of a driver 5 a non-rotary,longitudinally split brake ring Within the hub; an expander adapted toengage one of the longitudinal edges of said brale-ring; and anon-rotary wedge actuator operated by the driver and adapted to movelongitudinally to engage and shift the expander eiroumierentially andthereby to expand the brake ring; substantially as shown and described.

5. The combination with a revoluble hub, of a driver; a non-rotary,longitudinally split brake ring within the hub 3 an expanding barbetween the edges of said bra-ke ring; nonrotary Wedge means of the`saine angle adaptof a driver; a non-rotary part at one end ofi' v diehub; a brake carrier attached to said non rotary part but movablelongitudinally with f reference to it and carrying an inwardly directedWedge; an ex ansible brake ring nonrotatably supporter in said carrier;an e); panding bar adapted to engage said brake ring to expand it and tobe moved c1rouinierent1ally by longitudinal movement of said Wedge; anda conneetion between Said driver and said carrier whereby said'wedge ismoved longitudinally; substantially as shown ai.

described;

' FREDERICK S. ELLElT.

lfVitnessres D. L. Vvviirrriica,

RALPH D. WEBSTER.

